US4942416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing solution filtering device having a filter in a processing solution container
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1988-12-19
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Granted: 1990-07-17
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Expires: 2008-12-19
Abstract
Abstract A system for filtering circulating photosensitive material processing solution. The system includes a container for containing the circulating photosensitive material processing solution. The container has an inlet for receiving the circulating solution and an outlet for discharging the circulating solution. The system further includes a filter detachably covering the inlet or the outlet. The filter has an upper portion which projects above the surface of the circulating solution when the container is filled with the circulating solution. Thus, the filter can be easily removed from and attached to the container.
Inventors
- 👤 Yasuhito Yoshimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:47
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/02; G03D3/08; G03D3/13; G03D3/132
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
190 words
A method of easily replacing a filter within a photosensitive material processing system without leakage, said method comprising: providing a container holding photosensitive material processing solution, the container having a processing solution inlet and a processing solution outlet and a bottom surface, the processing solution extending in the container from said bottom surface to an upper surface of said processing solution along a depth dimension, said outlet being formed on the bottom surface of said container; providing a filter in said container, said filter having an upper portion located above the upper surface of said processing solution and said filter extending to said outlet, said filter being disposed in said container so that it extends substantially along the entirety of said depth dimension; removing the filter from the outlet of the container which is full of photosensitive material processing solution by gripping and manipulating the upper portion of said filter,; and attaching a replacement filter to said outlet of said container by gripping and manipulating an upper portion of said replacement filter, said upper portion of said replacement filter being located above said surface of said photosensitive material processing solution.
Claim 2
Independent Claim
190 words
A method of easily replacing a filter within a photosensitive material processing system without leakage, said method comprising: providing a container holding photosensitive material processing solution, the container having a processing solution inlet and a processing solution outlet and a bottom surface, the processing solution extending in the container from said bottom surface to an upper surface of said processing solution along a depth dimension, said outlet being formed on the bottom surface of said container; providing a filter in said container, said filter having an upper portion located above the upper surface of said processing solution and said filter extending to said outlet, said filter being disposed in said container so that it extends substantially along the entirety of said depth dimension; removing the filter from the outlet of the container which is full of photosensitive material processing solution by gripping and manipulating the upper portion of said filter,; and attaching a replacement filter to said outlet of said container by gripping and manipulating an upper portion of said replacement filter, said upper portion of said replacement filter being located above said surface of said photosensitive material processing solution.
Claim 3
Independent Claim
142 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having a bottom surface, an inlet for receiving said circulating solution and an outlet for discharging said circulating solution, at least one of said inlet and outlet being disposed at said bottom surface and said photosensitive material processing solution extending along a depth dimension from said bottom surface of said container to an upper surface of said solution; and a filter detachably covering one of said inlet and outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution, whereby said filter can be easily removed from and attached to said container and whereby said filter extends along substantially the entirety of said depth dimension.
Claim 4
Independent Claim
142 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having a bottom surface, an inlet for receiving said circulating solution and an outlet for discharging said circulating solution, at least one of said inlet and outlet being disposed at said bottom surface and said photosensitive material processing solution extending along a depth dimension from said bottom surface of said container to an upper surface of said solution; and a filter detachably covering one of said inlet and outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution, whereby said filter can be easily removed from and attached to said container and whereby said filter extends along substantially the entirety of said depth dimension.
Claim 5
Dependent Claim
18 words
The system of claim 2, wherein a lower portion of said filter is removably attached to said outlet.
Claim 6
Dependent Claim
28 words
The system of claim 3, wherein said filter includes a grip located at said upper portion for easily attaching or removing said filter to or from said outlet.
Claim 7
Dependent Claim
31 words
The system of claim 2, further comprising support means located at said upper portion for stably supporting said filter within said container, said support means being detachably fixed to said container.
Claim 8
Dependent Claim
16 words
The system of claim 5, wherein said support means is detachably fixed to said upper portion.
Claim 9
Dependent Claim
13 words
The system of claim 2, wherein said filter is connected to said inlet.
Claim 10
Dependent Claim
33 words
The system of claim 2, further comprising guide means for guiding photosensitive material through a predetermined course within said container; said filter being located so as not to interfere with said guide means.
Claim 11
Dependent Claim
57 words
The system of claim 8, wherein said guide means includes: rollers for supporting photosensitive material, one or more of said rollers being located within said solution when said container is filled with said solution; guide members for guiding said photosensitive material along said rollers; and means for supporting said rollers and said guide members within said container.
Claim 12
Dependent Claim
35 words
The system of claim 9, wherein said rollers extend the width of said photosensitive material, each one of said rollers being in contact with another one of said rollers to hold said photosensitive material therebetween.
Claim 13
Dependent Claim
20 words
The system of claim 1, further comprising circulating means connected between said inlet and said outlet for circulating said solution.
Claim 14
Dependent Claim
43 words
The system of claim 11, wherein said circulating means includes: piping connected to said inlet and said outlet for guiding said circulating solution; and a pump connected to said piping for applying pressure to circulate said solution through said piping and said container.
Claim 15
Dependent Claim
16 words
The system of claim 11, further comprising means for maintaining said solution at a predetermined temperature.
Claim 16
Independent Claim
105 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having an inlet for receiving said circulating solution and an outlet for discharging said circulating solution; and a filter detachably covering said inlet or said outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution and a lower portion which is removably attached to said outlet, whereby said filter can be easily removed from and attached to said container; said lower portion being screwed into said outlet.
Claim 17
Independent Claim
105 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having an inlet for receiving said circulating solution and an outlet for discharging said circulating solution; and a filter detachably covering said inlet or said outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution and a lower portion which is removably attached to said outlet, whereby said filter can be easily removed from and attached to said container; said lower portion being screwed into said outlet.
Claim 18
Independent Claim
114 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having an inlet for receiving said circulating solution and an outlet for discharging said circulating solution; and a filter detachably covering said inlet or said outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution and a lower portion which is removably attached to said outlet, whereby said filter can be easily removed from and attached to said container; said filter including means located at said lower portion for preventing filtrate from diffusing into said solution.
Claim 19
Independent Claim
114 words
A system for filtering circulating photosensitive material processing solution, said system comprising: a container for containing circulating photosensitive material processing solution, said container having an inlet for receiving said circulating solution and an outlet for discharging said circulating solution; and a filter detachably covering said inlet or said outlet, said filter having an upper portion which projects above the surface of said circulating solution when said container is filled with said circulating solution and a lower portion which is removably attached to said outlet, whereby said filter can be easily removed from and attached to said container; said filter including means located at said lower portion for preventing filtrate from diffusing into said solution.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |